Bio-based Wood Panel Binders Using Unrefined Biomass and Polyol Esters
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Solution Overview
Problem
The wood composite industry faces challenges in reducing the use of fossil-based substances and volatile organic compounds (VOCs) in binder systems, particularly with formaldehyde and isocyanate-based resins, which are toxic and have high Global Warming Potential (GWP), and existing bio-based binders require extensive refining processes and additives, increasing costs and environmental impact.
Innovation Solution
The use of unrefined biological materials, such as whole oilseeds, in combination with a reduced amount of reactive prepolymers, to create a bio-based binder composition that reduces fossil-based content, GWP, and eliminates the need for additional additives, while maintaining performance and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If pMDI is used as a binder, then adhesion performance is improved, but press build-up occurs compromising manufacturing continuity
Solution Approach 1:
A releasing agent comprising vegetable oil and a polyol ester is introduced as an intermediary substance between the pMDI binder and the metal press platen. The releasing agent prevents direct contact and adhesion between pMDI and the metal surface, eliminating press build-up while allowing the binder to maintain its adhesion function on the wood particles.
2Strength
If pMDI is used as a binder, then binding performance is improved, but stability in aqueous medium deteriorates
Solution Approach 1:
The polyol ester component of the releasing agent acts as a protective intermediary layer that stabilizes the pMDI binder system when in contact with aqueous environments. This intermediary layer prevents direct interaction between pMDI and water, maintaining binder stability during production interruptions or moisture exposure.
3Strength
If pMDI is used as a binder, then binding efficiency is improved, but cold tack is insufficient causing mat breakage
Solution Approach 1:
The releasing agent system combines vegetable oil and polyol ester to create a dual-function system: it provides the necessary cold tack to prevent mat breakage during handling while simultaneously serving as a releasing agent to prevent press build-up. The two components work synergistically to address multiple operational requirements.
4Reliability
If releasing agents are used to prevent press build-up, then manufacturing continuity is improved, but fossil-based substance consumption increases
Solution Approach 1:
The releasing agent formulation uses vegetable oil (biodegradable, renewable) instead of traditional fossil-based releasing agents. This parameter change in the chemical composition maintains the releasing function while eliminating the environmental disadvantage of fossil-based substance consumption.
5Object-affected harmful factors
If bio-based binders are used to reduce fossil-based substances, then environmental impact is improved, but binding performance deteriorates
Solution Approach 1:
The binder system uses a composite approach by combining pMDI (petrochemical) with a biodegradable releasing agent (vegetable oil and polyol ester). This composite system maintains the superior binding performance of pMDI while introducing environmentally friendly components that reduce the overall environmental impact through biodegradability and reduced fossil-based substance consumption.
Data Source
AI summary
The present invention concerns the field of binders suitable for wood panel manufacturing. In particular, the invention regards a composition of bio-binder comprising unrefined biological material and a reactive prepolymer. In a further aspect a method for producing bio-based binders is presented. In an even further aspect the present invention describes bio-based formaldehyde-free binders obtainable from the described methods and their uses. The invention further describes methods for gluing articles and products obtainable from the methods of the present invention.